fix(tables): align the workflow-group drag ghost with the label it previews

Cursor Bugbot caught the sibling of the ghost fixed in column-header-menu:
this one kept an inline `font-weight:500` after the band label dropped to
the inherited 400, so the drag preview no longer matched the text it
represents — the same mirror drift this PR fixes for the width-measurement
spans.

It was drifted on size too: hardcoded `font-size:13px` against a label that
is `text-xs` (11px), so it never matched. Both now come from the token the
label uses, which also clears the inline fontWeight the styling rule bans.

Author: waleedlatif1

apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/table-grid/headers/workflow-group-meta-cell.tsx

@@ -368,8 +368,9 @@ export function WorkflowGroupMetaCell({
 
     const ghost = document.createElement('div')
     ghost.textContent = name
+    ghost.className = 'text-xs'
     ghost.style.cssText =
-      'position:absolute;top:-9999px;padding:4px 8px;background:var(--bg);border:1px solid var(--border);border-radius:4px;font-size:13px;font-weight:500;white-space:nowrap;color:var(--text-primary)'
+      'position:absolute;top:-9999px;padding:4px 8px;background:var(--bg);border:1px solid var(--border);border-radius:4px;white-space:nowrap;color:var(--text-primary)'
     document.body.appendChild(ghost)
     e.dataTransfer.setDragImage(ghost, ghost.offsetWidth / 2, ghost.offsetHeight / 2)
     requestAnimationFrame(() => ghost.parentNode?.removeChild(ghost))